Kids Riddles

Question: I take what you receive and surrender it all by waving my flag.What am I?

Question: What demands an answer, but asks no question?

Question: I wear a red coat and have a stone in my throat.

What am I?

Question: Weight in my stomach,trees on my back,nails in my ribs,it's feet I lack.What am I?

Question: When do you go at red, but stop at green?